Which race would you add to Heroes?

The more races there are, the more interesting the game becomes. Personally, almost all the races are no longer as interesting to me as they were at the beginning... Except for the Dwarves, because I haven't played with them much.
P.S. And with the Barbarians, I would add the Conflux from the third game... But make it stronger, and combine it as a race, rather than just a collection of monsters.